Open redirect: Slack

 1name: "Open redirect: Slack"
 2description: |
 3    Message contains use of Slack's open redirect but the sender is not Slack.
 4type: "rule"
 5severity: "low"
 6source: |
 7  type.inbound
 8  and 0 < length(body.links) < 10
 9  and sender.email.domain.root_domain not in~ ('atlassian.net', 'slack.com', 'soundtrap.com')
10  and any(body.links,
11          .href_url.domain.domain == 'slack-redir.net'
12          and strings.ilike(.href_url.query_params, '*url=*')
13  )  
14tags:
15  - "Attack surface reduction"
16attack_types:
17  - "Credential Phishing"
18  - "Malware/Ransomware"
19tactics_and_techniques:
20  - "Open redirect"
21detection_methods:
22  - "Sender analysis"
23  - "URL analysis"
24id: "1b15f4a3-e7ab-56c1-9ba3-f63788389ebe"